Y-Ba-Cu-O thin films were in-situ fabricated on LaAlO3(100) substrates using the second harmonics of a pulsed Nd:YAG laser. Thin films were deposited under 200 (mtorr) of oxygen atmosphere, when the substrate temperature was changed between 67$0^{circ}C$ and 82$0^{circ}C$. After deposition, the films were in-situ annealed at 50$0^{circ}C$ under 2/3 bar of oxygen pressure. We showed that the deposition temperature affects the formation of superconducting phase, the resistance, and the surface morphology. The Y-Ba-Cu-O thin films deposited at 76$0^{circ}C$ show the zero resistance critical temperature of 85 K.